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Spatiotemporal variation in nitrogen and phosphorus levels and microbial community in the upstream water transport channel to the Douhe Reservoir

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Abstract

The Douhe Reservoir is an important diversion water source and drinking water resource for Tianjin and the Tangshan cities. Panjiakou, Daheiting, Qiuzhuang, and the Douhe Reservoirs located from top to bottom in the LuanHe River region forming a group of cascade reservoirs. After over 30 years of aquaculture, the concentration of nitrogen (N) and phosphorus (P) have exceeded Class III of Environmental Quality Standard for Surface Water in China. We selected the Douhe Reservoir as the study site and choose sampling points in several upstream reservoirs and main reservoir area, and we collected a total of 18 water samples. Moreover, the distribution characteristics of N and P levels in flood season and dry season were studied in the Douhe Reservoir and upstream water channel, respectively. The results indicated that there were significant spatial differences between N and P distribution in the Douhe Reservoir and the upstream sites. We observed that the distribution of N and P had seasonal characteristics, and the contents of nitrate(NO3-N), nitrogen(TN), total phosphorus(TP), and total dissolved phosphorus(TDP) in flood periods were higher than those in dry periods. The microbial community structure illustrated that the dominant phylum displayed seasonal differences between the upstream channel and the reservoir area. Among them, the abundance of some genera changed with the location of the channel, the microbial community structure, and the levels of N and P, especially in flood season. Particularly, NO3-N and TN had the most significant correlation. Hence, this study presented an important theoretical foundation for the risk prevention and the control of nutrient elements in the LuanHe River basin in the future, which would enhance the drinking water safety of Tianjin and Tangshan residents.

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Data availability

The datasets generated and/or analyzed during the current study are not publicly available because the project is not finished but are available from the corresponding author on reasonable request.

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Funding

This research was funded by the Fundamental Research Funds for the Central Public-interest Scientific Institution(2020YSKY-009).

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Yueting Fan: Writing—Original draft preparation, Pollution Source Investigation. Qing Fu: Formal Analysis, Project Administration. Shusong Zhang: Microbial Analysis. Moli Zhang: Software. Sheng Chang: Writing—Review and Editing, Supervision. Shaoyan Zhao: Data Curation, Resources. Minling Wang: Sample collection.

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Correspondence to Sheng Chang.

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The authors declare no competing interests.

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Fan, Y., Fu, Q., Zhang, S. et al. Spatiotemporal variation in nitrogen and phosphorus levels and microbial community in the upstream water transport channel to the Douhe Reservoir. Environ Sci Pollut Res 29, 50471–50487 (2022). https://doi.org/10.1007/s11356-022-19273-0

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  • DOI: https://doi.org/10.1007/s11356-022-19273-0

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